public class MobileTelephone {
   SIM card;
   public void useSIM(SIM card) {
      this.card=card;
   }
   public void showMess() {
      System.out.println("Ê¹ÓÃµÄ¿¨ÊÇ:"+card.giveCorpName()+"Ìá¹©µÄ");
      System.out.println("ÊÖ»úºÅÂëÊÇ:"+card.giveNumber());
   }
}

